The battle of the peanut butter cups is officially on, with Nestle versus Hershey. Nestle plans to release a Butterfinger peanut butter cup next year, starting a whole new candy feud for the world's candy cup connoisseurs to indulge in.

The candy looks similar to a Hershey's Reeses peanut butter cup, with a Butterfinger smooth and crunchy peanut butter filling in a chocolate shell. Unlike Reeses though, it comes in a square shape with round edges rather than in a circle.

"The peanut butter cup is America's favorite candy," Jeremy Vandervoet, brand manager for Butterfinger, told CNBC. "This is the first time the peanut butter cup will change."

Nestle has already purchased its first-ever Super Bowl commercial for 2014 to advertise the new version of its 90-year-old candy bar.

The candy world may be buzzing, but Hershey isn't worried. "Reese's is on of America's most beloved brands," said Anna Lingeris, senior manager of brand PR and consumer engagement at Hershey. According to Nielsen reports, Hershey was the only domestic candy brand to top $1 billion in sales last year.

The cups are to come in 1.5-ounce packs with two cups, 3-ounce packs with four cups and 40-ounce bags for sharing -- or not.

Regardless of how well the new Butterfinger cups sell, they have at least one undeniable fan in Bart Simpson.

Are you a fellow fan of all things chocolate? Follow me on Twitter: @Jenn_Harris_